Medicine

Bukhari :: Book 7 :: Volume 71 :: Hadith 673

Narrated Abu Huraira:

Allah's Apostle said, "If a fly falls in the vessel of any of
you, let him dip all of it (into the vessel) and then throw it
away, for in one of its wings there is a disease and in the other
there is healing (antidote for it) i e. the treatment for that
disease."